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BOMBARDIER Ski-Doo 1978 Series Operator's Manual page 33

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SYMPTOMS
POSSIBLE CAUSES
WHAT TO 00
Engine turns over but
1.
No fuel to the engine
Check the tank level and fill up with correct
fails to start or starts
gas~oil
mixture Check forpossible cloggmg
with difficulty
offuel line, item 5.
2.
Spark plug
Check for fouled or defective spark plug. Dis-
connect spark plug wire, unscrew plug and
remove from cylinder head. Reconnect wire
and ground exposed plug on engine cowl or
head, being careful to hold away from spark
plug hole. Follow engine starting procedure
and check for spark. If no sparks, appear, re-
place spark plug. If trouble persists, check
item 3.
3.
Faulty ignition
Disconnect spark plug wire from plug, un-
screw the spark plug cap then hold wire
about 3 10m I
Ya"l
from the cylmder head. Follow
engine starting procedure and if no sparks
appear, it means a faulty ignnion system. Do
not attempt to repair. Contact your dealer.
4.
Flooded engine
Remove wetspark plugs, turn ignition to
OFF and crank engine several times Install
clean dry spark plugs. Start engine following
usual starting procedure. If engine continues
tolIood, see your dealer.
5.
Clogged fuel line (water or
Remove and clean the fuel filter. If applicable,
dirt)
change filter cartridge. Check condition and
connections offuel lines. Check the cleanliness
offuel tank.
6.
Faulty carburetor
First make primary adiusnnents on carhure-
tor ISee Maintenance SectionI.If carbure-
toris still faulty, contact your dealer
forrepair.
7.
Too much oil in fuel
Drain the fuel tank and refill with the correct
gas
I
oilmixture.
8.
Engine timing
Engine timing may be detecnve
Of
out of
adjustment Contact your dealer.
9.
Poor engine compression
Running with alean fuel mixture may pro-
duce excessive engine wear resulting inpoor
engina compression. If this occurs, contact
your dealer atonce.
Engine will not turn
1.
Seized engine
Inthe case ofa
se~ed
engine contact your
manually
dealer. Seizure isa direct result ofpoor lu-
brication.
31

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